Stereophonic

//ˌstɛɹi.əˈfɒnɪk// adj

Definitions

Adjective
  1. 1
    Of or pertaining to sound reproduction using two or sometimes more channels played at different locations to simulate the separation of sources along at least one spatial dimension.

    "[…] this 1953 Hansel und Gretel is a classic example of how a well produced mono recording can seem more stereophonic than many of its later stereophonic rivals."

Adjective
  1. 1
    designating the reproduction of sound using two or more independent audio channels wordnet

Etymology

From stereo- + -phonic, by analogy with stereoscopic.

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